On 09.02.24 15:07, Andrew Lunn wrote: > [Some people who received this message don't often get email from andrew@xxxxxxx. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > This email is not from Hexagon’s Office 365 instance. Please be careful while clicking links, opening attachments, or replying to this email. > > > On Fri, Feb 09, 2024 at 01:36:28PM +0100, Catalin Popescu wrote: >> DP83826 offers the possibility to tune the voltage of logical >> levels of the MLT-3 encoded TX data. This is especially interesting >> when the TX data path is lossy and we want to increase the voltage >> levels to compensate the loss. > Maybe i'm being nit-picky.... > > "TX data path is lossy" should probably be "TX data path as far as the > RJ46 socket is lossy". 802.3 probably defines the voltage at that > point. If you tune it so the voltage is too high at that point, you > are breaking the standard. So you can use this to adjust for losses in > your coupling and cable run to the front panel. You should not be > using this for range extension by cranking up the voltages. Yes, you > might be able to, but we should not be encouraging it. Indeed, the voltage drop (or loss) happens b/w the PHY and the connector (could be RJ45, LEMO, etc). Trying to reformulate : DP83826 offers the possibility to tune the voltage of logical levels of the MLT-3 encoded TX data. This is useful when there is a voltage drop in between the PHY and the connector and we want to increase the voltage levels to compensate for that drop. Is this more meaningful ? > > Andrew
